Last panel Reisen comes from her drawing in Touhou 8 when you beat her.
...!!You called?And so, I'm gonna give you some important tasks!Ah! It's you Eirin! You should have seen these girls! They were being so lazy and annoying! I was desperately trying to persuade them otherwise!Yes, in this stressful society, I demand some leeway for my heart!I, Houraisan Kaguya, propose a work system with 5 days off weekly!First, tell Eirin about the 5-day off system―Are you screwing with me!!!*slap*